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Seifert JA, Bemis EA, Ramsden K, Lowell C, Polinski K, Feser M, Fleischer C, Demoruelle MK, Buckner J, Gregersen PK, Keating RM, Mikuls TR, O’Dell JR, Weisman MH, Deane KD, Norris JM, Steere AC, Holers VM. Association of Antibodies to Prevotella copri in Anti-Cyclic Citrullinated Peptide-Positive Individuals At Risk of Developing Rheumatoid Arthritis and in Patients With Early or Established Rheumatoid Arthritis. Arthritis Rheumatol 2023; 75:507-516. [PMID: 36259174 PMCID: PMC10065886 DOI: 10.1002/art.42370] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 08/20/2022] [Accepted: 09/13/2022] [Indexed: 11/05/2022]
Abstract
OBJECTIVE Prevotella copri (P copri), a gut commensal, has been reported to be an immune-relevant organism in individuals with rheumatoid arthritis (RA). This study sought to evaluate anti-P copri (anti-Pc) antibody responses in our participant cohorts and to determine when in the natural history of RA such responses develop. METHODS We analyzed serum levels of immunoglobulin A (IgA) and IgG antibodies from a 27-kd protein of P copri (anti-Pc-p27), an immunogenic P copri protein, in study participants at risk of developing RA, participants who transitioned to RA, participants with early RA (<1 year of disease), and participants with established RA, with comparisons made to their matched controls. We also evaluated anti-Pc-p27 antibody levels in individuals stratified by RA-related autoantibody status. RESULTS Overall, participants with RA had significantly higher IgA anti-Pc-p27 antibody levels and trended toward higher IgG anti-Pc-p27 antibody levels compared with matched controls. When stratified by early versus established RA, participants with early RA had median IgG anti-Pc-p27 antibody levels that were overall higher, whereas median IgA anti-Pc-p27 antibody levels were statistically significantly higher in participants with established RA compared with their matched controls. In the autoantibody-specific analyses, the at-risk population with anti-cyclic citrullinated peptide (anti-CCP) antibodies, but not rheumatoid factor (RF), trended toward increased levels of IgG anti-Pc-p27. Additionally, RA participants who were seropositive for both CCP and RF had significantly increased levels of IgA anti-Pc-p27 antibodies and trended toward higher levels of IgG anti-Pc-p27 antibodies compared with matched controls. CONCLUSION Our findings support a potential etiologic role for P copri in both RA preclinical evolution and the subsequent pathogenesis of synovitis.
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Affiliation(s)
| | | | - Kristina Ramsden
- Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - Cassidy Lowell
- Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | | | - Marie Feser
- University of Colorado Denver, Aurora, Colorado
| | | | | | - Jane Buckner
- Benaroya Research Institute at Virginia Mason, Seattle, Washington
| | - Peter K. Gregersen
- Feinstein Institutes for Medical Research and North Shore-Long Island Jewish Health System, Manhasset, New York
| | | | - Ted R. Mikuls
- University of Nebraska Medical Center and VA Nebraska-Western Iowa Healthcare System, Omaha, Nebraska
| | - James R. O’Dell
- University of Nebraska Medical Center and VA Nebraska-Western Iowa Healthcare System, Omaha, Nebraska
| | | | | | | | - Allen C. Steere
- Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
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Rubenstein JL, Kadoch C, Wong VS, Hyun W, Lowell C. Interim results of a phase I trial of intraventricular rituximab plus methotrexate in recurrent CNS lymphoma: Macrophage polarization and acquired resistance to therapy. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.2532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Abstract
Using native species for phytoremediation may be more ecologically beneficial and cost-effective than monoculture planting approaches. This study evaluated the effect of various soil amendments and management on the potential of Midwestern prairie grasses to remediate field soil contaminated with polycyclic aromatic hydrocarbons (PAHs) and other pollutants. A greenhouse investigation was conducted using six different grass species native to Ohio. Plants were grown in buckets containing topsoil and a layer of field-collected contaminated soil. Buckets were amended with commercial compost, fertilizer, or a combination of both. Replicates were watered every fourth day (frequently) or every sixth day (infrequently). Chlorophyll content were measured monthly for five months during the growing season. After five months, cores were sampled from each treatment and the total petroleum hydrocarbon (TPH) and PAH concentration of the soil determined. Native Ohio grasses reduced TPH contamination at least 87% with frequent irrigation and 90% with infrequent irrigation from buckets containing both compost and fertilizer. PAHs were dissipated to concentrations below detection limit of 1 ppm except for benzo (123) perylene and indeno (123-cd) pyrene. Results of this study suggest that it may be effective to allow contaminated sites to re-vegetate with native grasses.
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Affiliation(s)
- K V Nedunuri
- International Center for Water Resource Management, Central State University, Wilberforce, OH 45384, USA.
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4
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Abstract
Fibrinogen binding to platelets triggers alpha(IIb)beta3-dependent outside-in signals that promote actin rearrangements and cell spreading. Studies with chemical inhibitors or activators have implicated protein kinase C (PKC) in alpha(IIb)beta3 function. However, the role of individual PKC isoforms is poorly understood. Biochemical and genetic approaches were used to determine whether PKCtheta is involved in alpha(IIb)beta3 signaling. PKCtheta was constitutively associated with alpha(IIb)beta3 in human and murine platelets. Fibrinogen binding to alpha(IIb)beta3 stimulated the association of PKCtheta with tyrosine kinases Btk and Syk, and tyrosine phosphorylation of PKCtheta, Btk and the actin regulator, Wiskott-Aldrich syndrome protein (WASP). Mouse platelets deficient in PKCtheta or Btk failed to spread on fibrinogen. Furthermore, PKCtheta was required for phosphorylation of WASP-interacting protein on Ser-488, an event that has been linked to WASP activation of the Arp2/3 complex and actin polymerization in lymphocytes. Neither PKCtheta nor Btk were required for agonist-induced inside-out signaling and fibrinogen binding to alpha(IIb)beta3. Thus, PKCtheta is a newly identified, essential member of a dynamic outside-in signaling complex that includes Btk and that couples alpha(IIb)beta3 to the actin cytoskeleton.
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Affiliation(s)
- A Soriani
- Division of Hematology-Oncology, Department of Medicine, University of California San Diego, La Jolla, CA, USA.
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5
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Hanna Z, Weng X, Kay DG, Poudrier J, Lowell C, Jolicoeur P. The pathogenicity of human immunodeficiency virus (HIV) type 1 Nef in CD4C/HIV transgenic mice is abolished by mutation of its SH3-binding domain, and disease development is delayed in the absence of Hck. J Virol 2001; 75:9378-92. [PMID: 11533201 PMCID: PMC114506 DOI: 10.1128/jvi.75.19.9378-9392.2001] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2000] [Accepted: 06/23/2001] [Indexed: 11/20/2022] Open
Abstract
The human immunodeficiency virus type 1 (HIV-1) Nef protein is an important determinant of AIDS pathogenesis. We have previously reported that HIV-1 Nef is responsible for the induction of a severe AIDS-like disease in CD4C/HIV transgenic (Tg) mice. To understand the molecular mechanisms of this Nef-induced disease, we generated Tg mice expressing a mutated Nef protein in which the SH3 ligand-binding domain (P(72)XXP(75)XXP(78)) was mutated to A(72)XXA(75)XXQ(78). This mutation completely abolished the pathogenic potential of Nef, although a partial downregulation of the CD4 cell surface expression was still observed in these Tg mice. We also studied whether Hck, one of the effectors previously found to bind to this PXXP motif of Nef, was involved in disease development. Breeding of Tg mice expressing wild-type Nef on an hck(-/-) (knockout) background did not abolish any of the pathological phenotypes. However, the latency of disease development was prolonged. These data indicate that an intact PXXP domain is essential for inducing an AIDS-like disease in CD4C/HIV Tg mice and suggest that interaction of a cellular effector(s) with this domain is required for the induction of this multiorgan disease. Our findings indicate that Hck is an important, but not an essential, effector of Nef and suggest that another factor(s), yet to be identified, may be more critical for disease development.
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Affiliation(s)
- Z Hanna
- Laboratory of Molecular Biology, Clinical Research Institute of Montreal, Montreal, Quebec H2W 1R7, Canada.
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6
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O'Laughlin-Bunner B, Radosevic N, Taylor ML, DeBerry C, Metcalfe DD, Zhou M, Lowell C, Linnekin D. Lyn is required for normal stem cell factor-induced proliferation and chemotaxis of primary hematopoietic cells. Blood 2001; 98:343-50. [PMID: 11435302 DOI: 10.1182/blood.v98.2.343] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Stem cell factor (SCF) binds to c-Kit and is an important mediator of survival, growth, and function of hematopoietic progenitor cells and mast cells. Lyn and other Src family members are activated by SCF and associate with phosphorylated tyrosine residues in the c-Kit juxtamembrane region. However, studies using c-Kit mutants incapable of directly recruiting Src family members suggest this kinase family plays a minimal role in c-Kit stimulus-response coupling mechanisms. The objective of this study was to specifically target Lyn and subsequently address its role in SCF-mediated responses of primary hematopoietic progenitor cells and mast cells. To this end, a dominant-inhibitory Lyn mutant and Lyn-deficient mice were used. Transfection of normal murine mast cells with kinase-inactive Lyn impaired SCF-induced growth. Further, SCF-induced proliferation and chemotaxis of Lyn-deficient mast cells were less than for wild-type mast cells. SCF-induced growth of progenitor cells lacking Lyn was also reduced compared with that of wild-type progenitor cells. Impairment of SCF-mediated responses of Lyn-deficient mast cells and progenitor cells did not result from reductions in surface expression of c-Kit. These studies demonstrate that Lyn is required for normal SCF-mediated responses of primary progenitors and for a differentiated lineage.
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Affiliation(s)
- B O'Laughlin-Bunner
- Basic Research Laboratory, Division of Basic Sciences, National Cancer Institute-Frederick, MD 21702, USA
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Pereira S, Zhou M, Mócsai A, Lowell C. Resting murine neutrophils express functional alpha 4 integrins that signal through Src family kinases. J Immunol 2001; 166:4115-23. [PMID: 11238661 DOI: 10.4049/jimmunol.166.6.4115] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
There is mounting evidence that alpha(4) (CD49d) integrins are involved in neutrophil recruitment and function during inflammatory responses. We report that all resting murine neutrophils derived from bone marrow or peripheral blood express easily detectable levels of alpha(4) integrins on their surface. These alpha(4) integrins were functional, as demonstrated by stimulation of respiratory burst when neutrophils adhered to surfaces coated with the murine vascular cell adhesion molecule-1 (mVCAM-1). Adhesion occurred via alpha(4) integrins, as preincubation of neutrophils with an anti-alpha(4)-specific Ab inhibited attachment to mVCAM-1. Direct cross-linking of the alpha(4) integrin subunit by surface-bound mAbs also elicited superoxide release and release of the secondary granule marker, lactoferrin. The functional responses that occurred downstream of alpha(4) integrin cross-linking required signaling by Src family kinases. Neutrophils derived from hck(-/-)fgr(-/-)lyn(-/-) triple-knockout or hck(-/-)fgr(-/-) double-knockout mice failed to undergo respiratory burst when plated on mVCAM-1. Triple mutant neutrophils were also defective in release of both superoxide and lactoferrin when plated on surfaces coated with mAbs directed against alpha(4). Correlated with impaired alpha(4)-induced functional responses, triple-mutant neutrophils also failed to spread and tightly adhere to anti-alpha(4) mAb-coated surfaces. This is the first direct evidence that functional alpha(4) integrins are expressed by murine PMNs, and that these surface molecules can mediate cellular responses such as tight adhesion, spreading, sustained respiratory burst, and specific granule release in vitro. Moreover the alpha(4) integrins, like all other integrins tested, use the Src family kinases to transduce intracellular signals.
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MESH Headings
- Animals
- Antibodies, Monoclonal/metabolism
- Antibodies, Monoclonal/physiology
- Antigens, CD/biosynthesis
- Antigens, CD/immunology
- Antigens, CD/physiology
- Cell Adhesion/genetics
- Cell Adhesion/immunology
- Cell Membrane/genetics
- Cell Membrane/immunology
- Cell Membrane/metabolism
- Cell Movement/genetics
- Cell Movement/immunology
- Cell Separation
- Cytoplasmic Granules/metabolism
- Integrin alpha4
- Integrins/biosynthesis
- Integrins/physiology
- Interphase/genetics
- Interphase/immunology
- Lactoferrin/metabolism
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Neutrophils/enzymology
- Neutrophils/immunology
- Neutrophils/metabolism
- Protein-Tyrosine Kinases/deficiency
- Protein-Tyrosine Kinases/genetics
- Proto-Oncogene Proteins/deficiency
- Proto-Oncogene Proteins/genetics
- Proto-Oncogene Proteins c-hck
- Receptors, Antigen, B-Cell/metabolism
- Receptors, Antigen, B-Cell/physiology
- Signal Transduction/genetics
- Signal Transduction/immunology
- Superoxides/metabolism
- Vascular Cell Adhesion Molecule-1/metabolism
- src-Family Kinases/deficiency
- src-Family Kinases/genetics
- src-Family Kinases/physiology
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Affiliation(s)
- S Pereira
- Department of Laboratory Medicine, University of California, San Francisco, CA 94143, USA
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8
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Pasquet JM, Quek L, Pasquet S, Poole A, Matthews JR, Lowell C, Watson SP. Evidence of a role for SHP-1 in platelet activation by the collagen receptor glycoprotein VI. J Biol Chem 2000; 275:28526-31. [PMID: 10871605 DOI: 10.1074/jbc.m001531200] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The Src homology (SH)2 domain-containing protein-tyrosine phosphatase SHP-1 is tyrosine phosphorylated in platelets in response to the glycoprotein VI (GPVI)-selective agonist collagen-related peptide (CRP), collagen, and thrombin. Two major unidentified tyrosine-phosphorylated bands of 28 and 32 kDa and a minor band of 130 kDa coprecipitate with SHP-1 in response to all three agonists. Additionally, tyrosine-phosphorylated proteins of 50-55 and 70 kDa specifically associate with SHP-1 following stimulation by CRP and collagen. The tyrosine kinases Lyn, which exists as a 53 and 56-kDa doublet, and Syk were identified as major components of these bands, respectively. Kinase assays on SHP-1 immunoprecipitates performed in the presence of the Src family kinase inhibitor PP1 confirmed the presence of a Src kinase in CRP- but not thrombin-stimulated cells. Lyn, Syk, and SLP-76, along with tyrosine-phosphorylated 28-, 32-, and 130-kDa proteins, bound selectively to a glutathione S-transferase protein encoding the SH2 domains of SHP-1, suggesting that this is the major site of interaction. Platelets isolated from motheaten viable mice (mev/mev) revealed the presence of a heavily tyrosine-phosphorylated 26-kDa protein that was not found in wild-type platelets. CRP-stimulated mev/mev platelets manifested hypophosphorylation of Syk and Lyn and reduced P-selectin expression relative to controls. These observations provide evidence of a functional role for SHP-1 in platelet activation by GPVI.
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Affiliation(s)
- J M Pasquet
- Department of Pharmacology, University of Oxford, Mansfield Road, Oxford OX1 3QT, United Kingdom
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9
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Crowley MT, Costello PS, Fitzer-Attas CJ, Turner M, Meng F, Lowell C, Tybulewicz VL, DeFranco AL. A critical role for Syk in signal transduction and phagocytosis mediated by Fcgamma receptors on macrophages. J Exp Med 1997; 186:1027-39. [PMID: 9314552 PMCID: PMC2199061 DOI: 10.1084/jem.186.7.1027] [Citation(s) in RCA: 384] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/1997] [Revised: 07/29/1997] [Indexed: 02/05/2023] Open
Abstract
Receptors on macrophages for the Fc region of IgG (FcgammaR) mediate a number of responses important for host immunity. Signaling events necessary for these responses are likely initiated by the activation of Src-family and Syk-family tyrosine kinases after FcgammaR cross-linking. Macrophages derived from Syk-deficient (Syk-) mice were defective in phagocytosis of particles bound by FcgammaRs, as well as in many FcgammaR-induced signaling events, including tyrosine phosphorylation of a number of cellular substrates and activation of MAP kinases. In contrast, Syk- macrophages exhibited normal responses to another potent macrophage stimulus, lipopolysaccharide. Phagocytosis of latex beads and Escherichia coli bacteria was also not affected. Syk- macrophages exhibited formation of polymerized actin structures opposing particles bound to the cells by FcgammaRs (actin cups), but failed to proceed to internalization. Interestingly, inhibitors of phosphatidylinositol 3-kinase also blocked FcgammaR-mediated phagocytosis at this stage. Thus, PI 3-kinase may participate in a Syk-dependent signaling pathway critical for FcgammaR-mediated phagocytosis. Macrophages derived from mice deficient for the three members of the Src-family of kinases expressed in these cells, Hck, Fgr, and Lyn, exhibited poor Syk activation upon FcgammaR engagement, accompanied by a delay in FcgammaR-mediated phagocytosis. These observations demonstrate that Syk is critical for FcgammaR-mediated phagocytosis, as well as for signal transduction in macrophages. Additionally, our findings provide evidence to support a model of sequential tyrosine kinase activation by FcgammaR's analogous to models of signaling by the B and T cell antigen receptors.
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Affiliation(s)
- M T Crowley
- G.W. Hooper Foundation, University of California, San Francisco, California 94143-0552, USA.
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10
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Gasparini R, McLaughlin C, Lowell C, Johnson A, Miller W. Rapid preliminary amniotic fluid cytogenetic results at 72 and 96 hours after culture setup; An alternative to interphase fish. Am J Obstet Gynecol 1997. [DOI: 10.1016/s0002-9378(97)80377-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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11
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Shirey RS, Morton SJ, Lawton KB, Lowell C, Kickler TS, Ness PM. Fenoprofen-induced immune hemolysis. Difficulties in diagnosis and complications in compatibility testing. Am J Clin Pathol 1988; 89:410-4. [PMID: 3348176 DOI: 10.1093/ajcp/89.3.410] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
A 70-year-old man developed severe immune intravascular hemolysis and renal failure following ingestion of fenoprofen, a nonsteroidal, anti-inflammatory drug. The patient's red blood cells were sensitized with both IgG and C3d. The serum reacted with normal red blood cells in the presence and absence of the drug. Addition of albumin to the serum inhibited the reactivity with both neat and drug-treated serum. These atypical serologic findings for drug-related immune hemolytic anemia were explained by (1) the measurement of fenoprofen by high performance liquid chromatography (HPLC) in the neat serum; and (2) solid-phase adsorption studies showing that albumin can bind drug, leading to the disappearance of agglutination when albumin is added. This case demonstrates the utility of drug levels and adsorption techniques to confirm the diagnosis of drug-induced immune hemolytic anemia despite the anomalous serologic results which obscured the diagnosis and management of the patient.
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Affiliation(s)
- R S Shirey
- Department of Laboratory Medicine, Johns Hopkins Hospital, Baltimore, Maryland 21205
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12
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Bogenhagen D, Lowell C, Clayton DA. Mechanism of mitochondrial DNA replication in mouse L-cells. Replication of unicircular dimer molecules. J Mol Biol 1981; 148:77-93. [PMID: 7310869 DOI: 10.1016/0022-2836(81)90236-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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13
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Abstract
Conditions are described in which the single strand-specific nuclease S1 selectively nicks mitochondrial DNA containing displacement loops without nicking supercoiled mitochondrial DNA. Using these conditions, the percentage of molecules containing displacement loops can be easily and accurately determined. This method is superior to the traditional electron microscopic examination for assessing the frequency of displacement loop-containing molecules. In addition, this method permits the determination of the relative specific activities of displacement loop and nondisplacement loop-containing mitochondrial DNA after various radioactive labeling protocols. S1 nuclease is shown to cleave the displaced strand of the displacement loop, to partially degrade the 7S-initiation strand, but not to cleave the parental template strand complementary to the 7S-initiation strand. The final product is a nicked circular molecule with at least two breaks localized within the displacement loop region in only one of the two parental strands.
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Affiliation(s)
- C Lowell
- Department of Pathology, Stanford University School of Medicine, California 94305, USA
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14
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Howitt JW, Lowell C. Topical anesthetic effectiveness. An old and new product evaluated. N Y State Dent J 1972; 38:549-50. [PMID: 4578243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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15
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Howitt JW, Lowell C. Topical anesthetic effectiveness. An old and new product evaluated. N Y J Dent 1972; 38:549-50. [PMID: 4562117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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